Select Transform: JSON template over JSON

Post by rtpg » Wed, Oct 18, 2017, 2:08 PM UTC

rraval wrote: post #18

rtpg wrote: post #14

I think there's a lot of useful unexplored territory in this sort of tool. So much work nowadays is happening in maps/dictionaries/what-have-you, with a lot of work being, essentially, data shape transformation. Despite this, many languages aren't great at this! we have tools that work alright on first-order operations but fall apart on higher level things. Even really simple things like "conditionally include a key"…

Since you're using Python for your example, it's worth mentioning that 3.5 extended the unpacking syntax [1] to sort of do what you want. foo = { 'a': 1, 'b': 2, **({ 'c': 3, 'd': 4, } if bar else {}), } This adds `c: 3` and `d: 4` into `foo` conditional on `bar`. [1] https://docs.python.org/3/whatsnew/3.5.html#pep-448-addition...

Post by rraval » Wed, Oct 18, 2017, 2:12 PM UTC

rtpg wrote: post #21

rraval wrote: post #18

Earlier quoted context omitted.

Since you're using Python for your example, it's worth mentioning that 3.5 extended the unpacking syntax [1] to sort of do what you want. foo = { 'a': 1, 'b': 2, **({ 'c': 3, 'd': 4, } if bar else {}), } This adds `c: 3` and `d: 4` into `foo` conditional on `bar`. [1] https://docs.python.org/3/whatsnew/3.5.html#pep-448-addition...

oh, this is most definitely a thing I want. Not sure if my coworkers would appreciate this however. Would still have liked a bit of a simpler syntax for inclusion but this could be worth the ugliness Nice that this works on lists as well.

Post by fiatjaf » Wed, Oct 18, 2017, 2:16 PM UTC

astral303 wrote: post #11

fiatjaf wrote: post #6

I like the fact that this exists, but I prefer to use jq. I also would like to know in which situation this is preferable to jq.

There's also http://jmespath.org -- the syntax for which is supported in AWS CLIs. Not sure which one is better at this point. Using jq still often feels like trying to decode a code golf contest entry.

Post by fiatjaf » Wed, Oct 18, 2017, 2:19 PM UTC

gliechtenstein wrote: post #17

Hi, my name is Ethan. I'm the creator. I thought I would provide some context on why I wrote this library, and how I'm using this right now. So here it goes: Other than ST.js, I also work on another open source project called Jasonette ( https://www.jasonette.com ), which lets you write an entire native iOS/Android app in nothing but JSON markup. And when you can express the entire app logic--from model to view to co…

Post by mishoo » Wed, Oct 18, 2017, 2:22 PM UTC

    return {
        labels: data.items.map(function(value){
            return {
                type: "label",
                value: value > 10 ? value : value * 100
            };
        })
    };